Heat exchangers and air conditioning equipment

Abstract

The present invention discloses a heat exchanger and air conditioning equipment, including a heat exchange chamber, a heat exchange tube located in the heat exchange chamber, and an air equalization device, wherein the air equalization device includes a main air duct connected to the air inlet of the heat exchange chamber, the main air duct is connected to a plurality of branch air ducts, the branch air ducts divide the heat exchange chamber into a plurality of sub-heat exchange areas, the branch air ducts are provided with through holes connecting the inside and outside of the ducts, the main air ducts are arranged in the up-down direction, and the air inlet of the heat exchange chamber is arranged at the bottom thereof. The present invention arranges the air inlet of the heat exchange chamber at the bottom thereof, and cooperates with the air equalization device, so that when the overheated gas enters from the bottom of the heat exchange chamber upward along the main air duct, it can dissipate heat through the main air duct, and can also exchange heat with the liquid entering the main air duct or / and the branch air duct through the through hole, thereby removing other overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, in particular to a heat exchanger and air conditioning equipment. Background Art

[0002] In the air conditioning heat exchange system, the compressor outlet is connected to the condenser. The superheated gaseous refrigerant discharged by the compressor directly enters the condenser for heat exchange. The superheated gaseous refrigerant needs to go through the first stage of heat exchange to convert the superheated gaseous refrigerant into saturated gaseous refrigerant. Data show that the heat exchange intensity of saturated gaseous refrigerant is 10-20 times that of superheated gaseous refrigerant. Therefore, the conversion effect at this stage has a very important influence on the heat exchange performance of the condenser.

[0003] After becoming a saturated gaseous refrigerant, the second stage of heat exchange is carried out, that is, the saturated gaseous refrigerant is converted into a saturated liquid refrigerant to complete the heat exchange in the condenser.

[0004] In the existing condenser structure, superheated gas enters from the top, and the cooled liquid gathers at the bottom and is discharged from the drain port at the bottom. In order to meet the process of complete conversion of superheated gas into saturated gas, a larger heat exchange area at the top is required, and the remaining heat exchange area is used for subsequent heat exchange. This not only has low heat exchange efficiency, but also wastes structural space and heat exchange area, which is not conducive to energy efficiency improvement and cost control of the condenser.

[0005] The invention patent with application number CN201310740172.8 discloses a shell and tube condenser, which utilizes a plurality of liquid guide plates arranged in the shell and tube to divide the shell into a plurality of chambers, so that the heat exchange tubes are arranged in the plurality of chambers, and there are intervals between the chambers, thereby forming a gas flow channel for allowing the refrigerant gas to flow to the plurality of chambers. Although the gas flow channel between the chambers improves the uniformity of the refrigerant to a certain extent, since the superheated gas still needs to be passed from the top of the shell, the superheated gas cylinder still contacts the heat exchange tube first when entering the shell, and still needs to consume a large number of heat exchange tubes for heat exchange. Since the gas is superheated gas instead of saturated gas at this time, the heat exchange efficiency is still low.

[0006] Therefore, how to reduce the superheat of the superheated gas before it contacts the heat exchange tubes has become a technical problem that needs to be solved urgently in the industry. Summary of the invention

[0007] In order to solve the problem of high superheat before the superheated gas contacts the heat exchange tube, the present invention proposes that the air inlet is arranged at the bottom of the heat exchange chamber so that the superheated gas forms convection heat exchange with the descending liquid, thereby reducing the superheat of the gas.

[0008] The technical solution adopted by the present invention is to design a heat exchanger, including a heat exchange chamber, a heat exchange tube located in the heat exchange chamber, and an air equalization device, the air equalization device including a main air duct connected to the air inlet of the heat exchange chamber, the main air duct is connected to a plurality of branch air ducts, the branch air ducts divide the heat exchange chamber into a plurality of sub-heat exchange areas, the branch air ducts are provided with through holes connecting the inside and outside of the ducts, the main air duct is arranged in the up and down directions, and the air inlet of the heat exchange chamber is arranged at its bottom.

[0009] In certain embodiments, one end of the bronchial duct away from the main gas duct is tilted upward, so that the liquid in the bronchial duct can flow downward back to the main gas duct.

[0010] In some embodiments, a downwardly inclined liquid guide plate is provided in the middle of the bronchial lumen, and the liquid guide plate guides the liquid entering the bronchial duct to the main air duct, and through holes are provided on the duct walls on both sides of the upper and lower sides of the liquid guide plate.

[0011] In certain embodiments, the bronchial duct includes a first end and a second end that are arranged opposite to each other, the first end is connected to the main gas duct, the second end is closed, and the inner side of the second end is connected to the liquid guide plate.

[0012] In some embodiments, a liquid return chamber is connected to the bottom of the main air pipeline, the upper part of the liquid return chamber is connected to the main air pipeline, a liquid blocking portion is provided at the lower part of the liquid return chamber corresponding to the main air pipeline, and through holes are provided on both sides of the liquid blocking portion.

[0013] In some embodiments, the liquid return chamber is horizontally arranged, and through holes are arranged on the upper and lower side walls of the liquid return chamber.

[0014] In certain embodiments, the air inlet of the heat exchange chamber includes an air inlet pipe, the air inlet pipe is in communication with the liquid return chamber, and a liquid discharge port is disposed at the lower portion of the heat exchange chamber.

[0015] In certain embodiments, the gas equalization device is a thin-walled cavity made of a good thermal conductive material.

[0016] In some embodiments, the through hole is a long hole opened along the lateral direction of the bronchial tube, and the long hole is arranged crosswise with the heat exchange tube.

[0017] In certain embodiments, the gas equalizing device structure is symmetrical about the main gas duct.

[0018] Air conditioning equipment includes the above-mentioned heat exchanger.

[0019] In certain embodiments, the heat exchanger is a condenser.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention arranges the air inlet of the heat exchange chamber at the bottom thereof, and cooperates with the gas equalization device, so that when the overheated gas enters the heat exchange chamber from the bottom upward along the main gas pipeline, it can dissipate heat through the main gas pipeline, and can also exchange heat with the liquid entering the main gas pipeline or / and the branch gas pipeline through the through hole, thereby removing other overheating.

[0022] 2. The gas equalizing device of the present invention is a solid pipeline, which can not only make the gas enter each pipe layout area in the condenser evenly, but also use the principle of gas rising and liquid falling to form convection to remove overheating.

[0023] 3. By setting a liquid guide plate in the middle of the branch pipe, the liquid guide plate collects the liquid generated in the upper heat exchange area to prevent the liquid from falling into the heat exchange tube in the lower heat exchange area, avoiding multiple accumulation of liquid on the wall of the heat exchange tube, and reducing the influence of the liquid film on the heat exchange performance of the heat exchange tube; the collected liquid and the intake air are in the same channel and opposite direction, forming convection during the intake process, so that the saturated liquid can be used to de-superheat the superheated gas. The liquid guide plate is also beneficial to increase the heat exchange contact area between gas and liquid.

[0024] 4. The liquid collected at the bottom of the shell can continue to exchange heat with the heat exchange tube at the bottom to form a supercooling area. The liquid in the supercooling area is located around the main gas pipeline, which is beneficial to dissipate the heat of the superheated gas entering the main gas pipeline, thereby achieving early de-superheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is described in detail below in conjunction with specific embodiments and drawings. In order to show details and facilitate understanding of its principles, it is not necessarily drawn to scale, and similar reference numerals may describe similar components in different views. The drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Among them:

[0026] Figure 1 Schematic cross-sectional view of the heat exchanger of this embodiment.

[0027] Figure 2 Schematic diagram of the air exchange and equalization device of this embodiment.

[0028] Figure 3 It is a three-dimensional schematic diagram of this embodiment.

[0029] In the figure, 1, heat exchange chamber; 2, heat exchange tube; 3, air inlet pipe; 4, branch pipe; 41, liquid guide plate; 42, through hole; 5, liquid discharge port; 6, liquid return chamber; 61, liquid blocking part; 7, main gas pipe. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described in conjunction with the accompanying drawings, but the present invention is not limited to these embodiments, and the following embodiments do not limit the invention involved in the claims. In addition, all combinations of the features described in the embodiments are not necessarily required for the solutions of the invention.

[0031] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0032] Example

[0033] like Figure 1 , 2 As shown in Figure 3, a heat exchanger is described. This embodiment takes a shell and tube condenser as an example, comprising a heat exchange chamber 1 located in a shell, a heat exchange tube 2 located in the heat exchange chamber 1, and an air equalization device. The air equalization device in this embodiment comprises a main air duct 7 connected to the air inlet of the heat exchange chamber 1, and several branch air ducts 4 are connected to the main air duct 7. In this embodiment, three branch air ducts 4 are respectively arranged on both sides of the main air duct 7, and the structure of the air equalization device is symmetrical about the main air duct 7, thereby forming a tree-like structure of the air equalization device. The branch air duct 4 divides the heat exchange chamber 1 into several sub-heat exchange zones. The space surrounded by the main air duct 7, the branch air duct 4 and the inner wall of the shell can be regarded as a sub-heat exchange zone. The heat exchange tubes 2 are distributed in these sub-heat exchange zones. The branch air duct 4 is provided with a through hole 42 connecting the inside and outside of the duct, so that the gas enters each sub-heat exchange zone through the through hole 42, and the coolant formed in each sub-heat exchange zone can also enter the duct through the through hole 42.

[0034] The gas equalizing device in this embodiment is a solid pipeline, which is different from the prior art (invention patent with application number CN201310740172.8) in which the heat exchange tube 2 is separated and set as a gas equalizing device. Since this embodiment is a solid pipeline, it has a better effect on gas uniformity and can also use the principle of gas rising and liquid falling to form convection to remove overheating.

[0035] The main gas pipeline 7 is arranged in the up and down directions, and the air inlet of the heat exchange chamber 1 is arranged at the bottom thereof. With such arrangement, when the superheated gas enters from the bottom of the heat exchange chamber 1 upward along the main gas pipeline 7, it can dissipate heat through the main gas pipeline 7, and can also exchange heat with the liquid entering the main gas pipeline 7 or / and the branch gas pipeline 4 through the through hole 42, so as to remove other overheating. Since the bottom of the main gas pipeline 7 is surrounded by the supercooled liquid gathered at the bottom of the heat exchange chamber 1, the temperature of the main gas pipeline 7 here is relatively low, and the heat dissipation effect on the superheated gas entering is obvious.

[0036] The end of the bronchial pipe 4 away from the main gas pipe 7 is tilted upward so that the liquid in the bronchial pipe 4 can flow downward back to the main gas pipe 7. In this way, more liquid can flow back to the main gas pipe 7. The refluxed liquid flows relative to the incoming gas, forming a better heat exchange, which is beneficial to remove other overheating.

[0037] A downwardly inclined liquid guide plate 41 is provided in the middle of the inner cavity of the bronchial duct 4. The liquid guide plate 41 guides the liquid entering the bronchial duct 4 to the main gas duct 7. Through holes 42 are provided on the pipe walls on the upper and lower sides of the liquid guide plate 41. The through holes 42 on the upper and lower sides are conducive to the dispersion and discharge of gas. The liquid guide plate 41 guides the liquid entering the bronchial duct 4 to the main gas duct 7.

[0038] The liquid guide plate 41 collects the liquid generated in the corresponding upper heat exchange area to prevent the liquid from falling onto the heat exchange tube 2 in the lower heat exchange area, avoids multiple accumulations of liquid on the wall of the heat exchange tube 2, and reduces the influence of the liquid film on the heat exchange performance of the heat exchange tube 2; the collected liquid and the intake air guide are in the same channel and opposite directions, forming convection during the intake process, so that the saturated liquid can be used to de-superheat the superheated gas.

[0039] The bronchial duct 4 includes a first end and a second end that are relatively arranged. The first end is connected to the main gas duct 7, and the second end is closed. The inner side of the second end is connected to the liquid guide plate, so that the liquid guide plate has a good upward and downward diversion effect on the gas entering the bronchial duct 4 from the main gas duct 7. At the same time, no additional fixings are required to install the liquid guide plate, so that the equipment is simplified, the flow guidance is smooth, and the gas distribution is uniform.

[0040] The bottom of the main gas pipeline 7 is connected to a liquid return chamber 6, the upper part of the liquid return chamber 6 is connected to the main gas pipeline 7, and a liquid blocking portion 61 is arranged at the lower part of the liquid return chamber corresponding to the main gas pipeline 7. Through holes are arranged on both sides of the liquid blocking portion 61, that is, the area between the through holes on both sides is the liquid blocking portion 61, so that the liquid falling from the main gas pipeline 7 is dispersed to both sides of the liquid blocking portion 61, and then discharged from the through holes, so that the liquid flowing out of the through holes can be evenly distributed on the heat exchange tube 2 below, and evenly contact the heat exchange tube 2, which is conducive to rapid heat dissipation. The liquid return chamber 6 of this embodiment is arranged horizontally, and the upper and lower side walls of the liquid return chamber 6 are both provided with through holes, and the through holes on the upper and lower side walls can also be used as air outlets to play a role in gas uniformity.

[0041] The air inlet of the heat exchange chamber 1 includes an air inlet pipe 3, which is connected to the liquid return chamber 6. The incoming gas passes through the liquid return chamber 6 and then enters the main gas pipeline 7, so that the incoming gas can enter the liquid return chamber 6 for heat exchange, thereby increasing the heat exchange area in the pipeline and improving the de-overheating effect. A drain port 5 is provided at the lower part of the heat exchange chamber 1 for discharging excess liquid at the bottom.

[0042] The gas equalizing device is a thin-walled cavity made of a good thermal conductive material, for example, it can be formed by bending a sheet metal. The thin wall of the good thermal conductive material is conducive to improving the heat exchange efficiency.

[0043] The through hole 42 is a long hole opened along the 4-degree direction of the bronchial duct, and the long hole intersects the heat exchange tube 2, that is, the length of the long hole is perpendicular to the length direction of the heat exchange tube 2 in the reverse direction, thereby avoiding the heat exchange tube 2 from completely blocking the through hole 42, and is also beneficial to the uniform distribution of gas to each of the heat exchange tubes 2 arranged along the long hole, thereby improving the uniformity of heat exchange.

[0044] When the heat exchange chamber 1 is applied to air-conditioning equipment, the heat exchanger may be a condenser of the air-conditioning.

[0045] Although some terms are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention. The execution order of actions, steps, etc. in the devices and methods shown in the specification and the drawings can be implemented in any order as long as there is no special explicit limitation on the order and the output of the previous processing is not used in the subsequent processing. Similar sequential terms (for example, "first", "next", "secondly", "again", "then", etc.) used for the convenience of description do not mean that they must be implemented in such an order.

[0046] It should be understood by those skilled in the art that all directional references (for example, above, below, upward, up, downward, down, top, bottom, left, right, vertical, horizontal, etc.) are used descriptively in the drawings to facilitate the reader's understanding, and do not represent limitations (for example, on position, orientation or use, etc.) on the scope of the invention as defined by the appended claims. They are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the referred device or element must have a specific orientation or be constructed and operated in a specific orientation. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0047] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0048] In addition, some vague terms (e.g., substantially, certain, generally, etc.) may refer to slight inaccuracies or slight deviations of conditions, quantities, values, or dimensions, some of which are within the manufacturing deviation or tolerance range. It should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of this application.

[0049] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them in similar ways, without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A heat exchanger, comprising a heat exchange chamber, a heat exchange tube located in the heat exchange chamber, and a gas equalization device, characterized in that: The gas equalizing device includes a main air duct connected to the air inlet of the heat exchange chamber, the main air duct is connected to several bronchial ducts, the bronchial ducts divide the heat exchange chamber into several sub-heat exchange areas, the bronchial ducts are provided with through holes connecting the inside and outside of the duct, the main air duct is arranged in the up and down directions, and the air inlet of the heat exchange chamber is arranged at the bottom thereof; a downwardly inclined liquid guide plate is provided in the middle of the inner cavity of the bronchial duct, the liquid guide plate guides the liquid entering the bronchial duct to the main air duct, and through holes are provided on the duct walls on the upper and lower sides of the liquid guide plate.

2. The heat exchanger according to claim 1, characterized in that: One end of the bronchial tube away from the main gas tube is arranged to be inclined upward, so that the liquid in the bronchial tube can flow downward back to the main gas tube.

3. The heat exchanger according to claim 1, characterized in that: The bronchial duct includes a first end and a second end that are arranged opposite to each other, the first end is communicated with the main gas duct, the second end is closed, and the inner side of the second end is connected to the liquid guide plate.

4. The heat exchanger according to claim 1, characterized in that: The bottom of the main gas pipeline is connected with a liquid return cavity, the upper part of the liquid return cavity is connected with the main gas pipeline, a liquid blocking part is arranged at the lower part of the liquid return cavity corresponding to the main gas pipeline, and through holes are arranged on both sides of the liquid blocking part.

5. The heat exchanger according to claim 4, characterized in that: The liquid return cavity is arranged horizontally, and through holes are arranged on the upper and lower side walls of the liquid return cavity.

6. The heat exchanger according to claim 4, characterized in that The air inlet of the heat exchange chamber comprises an air inlet pipe, the air inlet pipe is communicated with the liquid return chamber, and a liquid discharge port is arranged at the lower part of the heat exchange chamber.

7. The heat exchanger according to claim 1, characterized in that The gas equalizing device is a thin-walled cavity made of a good thermal conductive material.

8. The heat exchanger according to claim 1, characterized in that The through hole is a long hole opened along the lateral direction of the bronchial tube, and the long hole is arranged crosswise with the heat exchange tube.

9. The heat exchanger according to claim 1, characterized in that: The structure of the gas equalizing device is symmetrical with respect to the main gas pipeline.

10. Air conditioning equipment, characterized in that Comprising the heat exchanger according to any one of claims 1 to 9.

11. The air conditioning device according to claim 10, characterized in that: The heat exchanger is a condenser.

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